Is essential when trying to address counterclaims to your argument with civility a- responding to every counterclaim b- avoiding the common ground c- maintaining an objective tone d- using strong words

Which of the following factors most consistently contributes to the speaker’s believability? a the age and experience of the speaker b the physical environment in which the speech is delivered c the sincerity, knowledge, and trustworthiness of the speaker d the position of the thesis statement in the speech